#!/usr/bin/env bash
# Lint, compile, and export superfig deliverables.
#   ./scripts/build.sh figure.tex [outdir]
set -euo pipefail

SRC="${1:?usage: build.sh figure.tex [outdir]}"
[[ -f "$SRC" ]] || { echo "no such file: $SRC" >&2; exit 2; }
SRCDIR="$(cd "$(dirname "$SRC")" && pwd)"
BASE="$(basename "$SRC" .tex)"
OUT="${2:-$SRCDIR/build}"
ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
mkdir -p "$OUT"

if [[ "${SF_SKIP_LINT:-0}" != "1" ]]; then
  echo "==> lint $BASE"
  python3 "$ROOT/scripts/lint.py" "$SRC"
fi

echo "==> xelatex $BASE"
TEXINPUTS="$ROOT/assets:$SRCDIR:" \
  xelatex -halt-on-error -interaction=nonstopmode \
          -output-directory="$OUT" "$SRC" >/dev/null 2>&1 \
  || { echo "!! xelatex failed; last errors:" >&2
       grep -n -A4 -m3 '^!' "$OUT/$BASE.log" >&2 || tail -30 "$OUT/$BASE.log" >&2
       exit 1; }

LOG="$OUT/$BASE.log"
status=0

if grep -q "Missing character" "$LOG"; then
  echo "!! missing glyphs:" >&2
  grep -m5 "Missing character" "$LOG" >&2
  status=1
fi
if grep -qE "^(Overfull|Underfull) \\\\[hv]box" "$LOG"; then
  echo "!! overfull/underfull boxes:" >&2
  grep -m5 -E "^(Overfull|Underfull) \\\\[hv]box" "$LOG" >&2
  status=1
fi
if grep -q "Package superfig Warning" "$LOG"; then
  echo "!! superfig warnings:" >&2
  grep -m5 -A2 "Package superfig Warning" "$LOG" >&2
  status=1
fi

if command -v pdftocairo >/dev/null 2>&1; then
  echo "==> exporting svg / png"
  pdftocairo -svg "$OUT/$BASE.pdf" "$OUT/$BASE.svg"
  pdftocairo -png -r 300 -singlefile                "$OUT/$BASE.pdf" "$OUT/$BASE"
  pdftocairo -png -r 300 -singlefile -transp        "$OUT/$BASE.pdf" "$OUT/$BASE-alpha"
  pdftocairo -png -scale-to-x 360 -scale-to-y -1 -singlefile \
                                                    "$OUT/$BASE.pdf" "$OUT/$BASE-thumb"
else
  echo "!! pdftocairo missing: PDF only, no SVG/PNG" >&2
  status=1
fi

echo "==> artifacts in $OUT"
ls -1 "$OUT/$BASE"*.{pdf,svg,png} 2>/dev/null | sed 's/^/    /'
if [[ $status -ne 0 ]]; then
  echo "==> BUILD DIRTY: fix the warnings above before delivering." >&2
else
  echo "==> clean. Now do the visual audit (references/checklist.md)."
fi
exit $status